Whats people's views on second timers for controlling the feed of a willma system in coco.

Used to using a normal timer that allows 15 min segments only had a play with a second timer. Not a normal second timer a homemade one, basically each segment on the converted timer equates ro 20secs.
So that gives me 32 mins for a full rotation of the timer witch would of been 24 hours

So basically in a 32 min period in full flower how many 20 sec segments would u look to have on and how spread out over that 32 mins would be ideal.
Using very large pots think there the biggest for the willam system

Had a play around myself but can't seem ro get it right either seem to stay very moist and heavy pots or seem ro be very light and not feed enough.

I no there are lots to consider when sorting a feeding schedule so prob what im more after Is any advice from anyone using or have used a second timer

Cheers guys